Which laser class poses the highest risk of severe injury?

Class 4 lasers pose the highest risk of severe injury due to their ability to cause significant damage to the skin and eyes. These lasers can emit high levels of energy, which can deliver strong beams capable of causing immediate and permanent harm upon exposure. The intensity and focus of Class 4 lasers can lead to thermal burns, eye damage, and even potential fire hazards.

In professional application settings, Class 4 lasers require stringent safety protocols to minimize risks, such as protective eyewear and controlled access environments. Understanding the hazards associated with Class 4 lasers is crucial for maintaining safety at facilities where they are used, highlighting the need for adequate training and protective measures for anyone working with or around these powerful devices.

The other classes, while they do have associated risks, do not represent the same level of potential harm as Class 4 lasers. Class 1 lasers are generally safe under normal operating conditions; Class 2 lasers can cause injury primarily if viewed directly for extended periods; and Class 3 lasers, while more dangerous than Class 2, still do not reach the severe risk levels posed by Class 4 lasers.